<?php

use BookStack\Entities\Queries\EntityQueries;
use BookStack\Entities\Repos\PageRepo;
use BookStack\Exceptions\NotFoundException;
use BookStack\Facades\Theme;
use BookStack\Http\Controller;
use BookStack\Theming\ThemeEvents;
use Illuminate\Http\Request;
use Illuminate\Routing\Router;

class CustomPageActionsController extends Controller
{
    public function __construct(
        protected PageRepo $pageRepo,
        protected EntityQueries $entityQueries,
    ) {
    }

    /**
     * If page exists, redirect to show page, otherwise to create page
     */
    public function showOrCreate(Request $request, string $bookSlug, string $chapterSlug = null)
    {
        $data = $this->validate($request, [
            'name' => ['required', 'string', 'max:255'],
        ]);

        $pageName = $data['name'];

        try {
            // Redirect to the page if an existing page is found
            $page = $this->entityQueries->pages->findVisibleBySlugsOrFail($bookSlug, $pageName);
            return redirect($page->getUrl());
        } catch (NotFoundException $e) {
            // Otherwise create a new page and start editing it
            if ($chapterSlug) {
                $parent = $this->entityQueries->chapters->findVisibleBySlugsOrFail($bookSlug, $chapterSlug);
            } else {
                $parent = $this->entityQueries->books->findVisibleBySlugOrFail($bookSlug);
            }

            $this->checkOwnablePermission('page-create', $parent);

            $page = $this->pageRepo->getNewDraftPage($parent);
            $this->pageRepo->publishDraft($page, [
                'name' => $pageName,
            ]);

            return redirect($page->getUrl('/edit'));
        }
    }
}

// Register the routes for our custom controller & action
Theme::listen(ThemeEvents::ROUTES_REGISTER_WEB_AUTH, function (Router $router) {
    $router->get('/books/{bookSlug}/show-or-create', [CustomPageActionsController::class, 'showOrCreate']);
    $router->get('/books/{bookSlug}/chapter/{chapterSlug}/show-or-create', [CustomPageActionsController::class, 'showOrCreate']);
});